An upper suction gas type lower staggered gas disc structure with primary filtration and adjustable pressure

Abstract

The utility model discloses an upper air extraction type lower air distribution disc structure with primary filtration and adjustable pressure, belongs to the vacuum filter structure of solid -liquid separation equipment, and specifically is the distribution head structure of rotary table vacuum filter and turnover disc vacuum filter, provides an upper air extraction type lower air distribution disc structure with primary filtration and adjustable pressure, and the chamber adopts cavity conical bottom plate, and uses the short partition of subarea to close relatively the primary filtration area, sets up the perforated baffle in the passageway of primary filtration area to central air extraction chamber, and uses the valve to adjust the pressure size of primary filtration area, and the valve rod passes through cavity outer bucket and can not stop the machine operation, and cavity conical bottom plate is not easy to scale compared with the original flat bottom plate, and the structure realizes the quick adjustment filter machine adaptation filtering process, provides stable production efficiency.

Description

Technical Field

[0001] This utility model pertains to the structure of a vacuum filter in solid-liquid separation equipment, specifically the distribution head structure of a rotary vacuum filter and a tilting disc vacuum filter. Background Technology

[0002] With the increasing application of rotary table and tilting disc vacuum filters in various industries, there is a need to address the diverse characteristics of different slurries, especially those that are relatively difficult to filter. These slurries have a wide range of solid particle sizes, and the filter cake formed during continuous filtration easily clogs the filter media and filter cloth. Combined with other characteristics of the slurry, this shortens the relative lifespan of the filter cloth. In different slurry filtration experiments, it was found that for some slurries, if the initial natural sedimentation during filter cake formation results in a bottom layer with a predominance of large particles, it significantly improves process indicators such as filtration capacity, filtrate solids content, and filter cake moisture content. Currently, the distribution head design of filter machines is usually adjustable, and the filter discs... Vacuum filtration begins when the feed reaches 1 / 3 to 2 / 3 of the fill volume to increase equipment capacity and effective filtration area. Therefore, to achieve this filtration process, the feed angle to vacuum filtration needs to be extended when designing the distribution head. This allows the filter disc to form a naturally settling filter cake after the feed is completed, and then filter again. The equipment needs to be customized by weighing the relative impact between the effective filtration area and the natural settling filter cake process. In actual production, the slurry process parameters will fluctuate and the slurry generation process will also be continuously improved. It is necessary to switch the filtration process to improve production efficiency. Therefore, a new distribution head structure is needed to meet the need for rapid adjustment and adaptation to changes in the filtration process. Summary of the Invention

[0003] To address the problems existing in the prior art, this utility model provides a top-extraction, bottom-displacement air-displacement structure with adjustable pressure for the primary filter. Its chamber uses a conical base plate, and the primary filter area is relatively enclosed by short partitions. An open partition is installed in the channel from the primary filter area to the central extraction chamber. A valve is used to adjust the pressure in the primary filter area. The valve stem passes through the outer chamber barrel, allowing operation without stopping the machine. Furthermore, the conical base plate is less prone to scaling than the original flat base plate. This structure enables rapid adjustment of the filter to adapt to the filtration process, providing stable production efficiency.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a pre-filtration adjustable pressure top-extraction and bottom-displacement air plate structure, consisting of a base plate, an inverted cone barrel, supporting ribs, a conical base plate, a liquid outlet, an outer barrel, partitioned long partitions, a panel, a central welded column, partitioned short partitions, an air inlet, a pre-filtrate outlet, an inner arc partition, an open partition, and an external control valve device; the annular panel has several fan-shaped holes, and the large circular opening with a diameter φ at the center of the panel is the top air extraction port; the space formed by welding the panel, the outer barrel, and the conical base plate is divided by several partitioned long and short partitions, forming partitioned chambers with different fan-shaped angles, each chamber corresponding to an auxiliary area, a pre-filtration area, a filtration area, and several washing areas; the inlet of the pre-filtration area is the corresponding fan-shaped opening on the panel, the liquid outlet is the pre-filtrate outlet welded to the conical base plate, and the gas outlet is the opening of the open partition welded to the channel formed by two partitioned short partitions; the auxiliary area... The inlet is an air inlet welded to the conical base plate of the cavity, and the outlet is a corresponding fan-shaped opening on the panel. The channel formed by the partition short partitions and partition long partitions is sealed by the welded inner arc partition. The inlets of the filtration zone and several washing zones are corresponding fan-shaped openings on the panel, and the liquid outlets are all liquid outlets welded to the conical base plate of the cavity. The gas outlet is formed by the fan-shaped channel formed by the partition long partitions, which converges upwards to the upper exhaust port. The partition long partitions are all welded to the central welded column. An inverted cone support is set below the conical base plate of the cavity, and a base plate is welded below the inverted cone. Several supporting ribs are set outside the inverted cone to support the outer ring surface of the conical base plate of the cavity, the outer barrel of the cavity, and the outer ring surface of the panel. The external control valve device can adopt various valve structures. A movable sealing device is set at the point where the valve stem protrudes from the outer barrel of the cavity, and the valve opening degree can be controlled. The pressure of the primary filtration zone can be changed by operating the external valve stem handle without stopping the machine, so that the primary filtration zone operates under normal pressure or different vacuum pressures.

[0005] The aforementioned adjustable pressure pre-filtration top-extraction bottom-displacement air plate structure uses partitioned short baffles, perforated baffles, and external control valves to form an independent chamber in the pre-filtration zone. When changing the filtration process, the pressure adjustment of the pre-filtration zone can be completed without stopping the machine, thus achieving the goal of adapting the equipment to the filtration process and ensuring the production efficiency of the equipment. Attached Figure Description

[0006] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0007] Appendix Figure 1 This is a schematic diagram of a top-extraction, bottom-displacement air-displacement structure with adjustable pressure for primary filtration. Appendix Figure 2 It is attached Figure 1 Top view; Appendix Figure 3 It is attached Figure 1 Enlarged view of part A in the middle; Appendix Figure 4 It is attached Figure 2 Enlarged view of part B in the middle; In the diagram: I. Auxiliary Zone, II. Pre-filtration Zone, III. Filtration Zone, φ. Upper Air Extraction Port, 1. Base Plate, 2. Inverted Conical Barrel, 3. Support Rib, 4. Cavity Conical Base Plate, 5. Liquid Outlet, 6. Outer Cavity Barrel, 7. Sectional Long Partition, 8. Panel, 9. Central Welded Column, 10. Sectional Short Partition, 11. Air Inlet, 12. Pre-filtrate Outlet, 13. Inner Arc Partition, 14. Perforated Partition, 30. External Control Valve Device, 301. Positioning Plate, 302. Valve Stem, 303. Eye Bolt, 304. Nut, 305. Small Clamping Plate, 306. Soft Conical Plug, 307. Large Clamping Plate, 308. Packing Seat, 309. Pressure Cap, 310. Packing, 311. Handle, 312. Screw, 313. Positioning Nut. Detailed Implementation

[0008] An embodiment of an adjustable-pressure pre-filtration top-extraction, bottom-displacement air-displacement structure comprises a base plate 1, an inverted conical barrel 2, supporting ribs 3, a conical base plate 4, a liquid outlet 5, an outer barrel 6, partitioned long partitions 7, a panel 8, a central welded column 9, partitioned short partitions 10, an air inlet 11, a pre-filtrate outlet 12, an inner arc partition 13, an open partition 14, and an external control valve device 30. The annular panel 8 has several fan-shaped holes, and the central diameter φ of the panel 8 is the top air extraction port. The space formed by welding the panel 8, the outer barrel 6, and the conical base plate 4 is divided by four partitioned long partitions 7 and two partitioned short partitions 10, forming an auxiliary zone I, a pre-filtration zone II, and a filter zone III. The filter zone III and several washing zones are included. The lower cavity conical base plate 4 of the primary filtration zone II has a pre-filtrate outlet 12 welded through an opening. An open partition plate 14 is welded to the inner end between two short partition plates 10, and an external control valve 30 is installed on the open partition plate 14. The lower cavity conical base plate 4 of the auxiliary zone I has an air inlet 11 welded through an opening. An inner arc partition plate 13 is welded to the inner end between its short partition plates 10 and long partition plates 7. The lower cavity conical base plate 4 of the filter zone III and several washing zones has an outlet 5 welded through an opening. All long partition plates 7 are welded to the central welded column 9. An inverted cone 2 is concentrically welded below the conical base plate 4. A base plate 1 is welded to the lower end of the inverted cone 2. A 5-shaped valve is installed on the outer wall of the inverted cone 2. The block support rib 3 is welded to the outer ring surface of the conical base plate 4, the outer ring surface of the outer barrel 6, and the outer ring surface of the panel 8; the external control valve device 30 consists of a positioning plate 301, valve stem 302, eye bolt 303, nut 304, small clamping plate 305, soft cone plug 306, large clamping plate 307, packing seat 308, gland 309, packing 310, handle 311, screw 312, and positioning nut 313. The opening of the positioning plate 301 is concentric with the opening of the opening partition 14. The upper and lower ends of the positioning plate 301 are welded to the panel 8 and the conical base plate 4, respectively. The packing seat 308 is welded to the corresponding opening of the outer barrel 6. The valve stem 302 passes through the gland 309 in sequence. The valve stem 302 consists of a packing 310, a packing seat 308, a large clamping plate 307, a soft cone plug 306, a small clamping plate 305, a nut 304, and a positioning plate 301. A hole bolt 303 is screwed into the inner end of the valve stem 302, and a handle 311 is inserted into the outer end. Tightening the pressure cap 309 pushes the packing 310 to seal the corresponding section of the valve stem 302. The soft cone plug 306 extends into the opening of the perforated partition 14 and is pressed and sealed at the edge of the opening. The two ends of the handle 311 are inserted into the threaded rod 312 and screwed into the positioning nut 313 welded to the outer wall of the outer barrel 6. Each threaded rod 312 has a positioning nut 313 screwed on both sides of the handle 311 to position the gap between the soft cone plug 306 and the opening of the perforated partition 14.

[0009] The above description is only a specific embodiment of the present utility model, but the implementation of the present utility model is not limited thereto. Any changes or modifications made within the field of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A pre-filter adjustable pressure top-suction type bottom-displacement air plate structure, comprising a base plate (1), an inverted cone barrel (2), supporting ribs (3), a cavity conical base plate (4), a liquid outlet (5), an outer cavity barrel (6), a partition long partition (7), a panel (8), a central welded column (9), a partition short partition (10), an air inlet (11), a pre-filter liquid outlet (12), an inner arc partition (13), an open partition (14), and an external control valve device (30); characterized in that... The cavity bottom of the adjustable pressure primary filter with an upper suction type and a lower staggered air plate structure adopts a cavity conical bottom plate (4). The inner end of the partition short partitions (10) of the primary filter zone (II) is welded with an open partition plate (14). An external control valve device (30) is provided on the open partition plate (14). The valve stem (302) of the external control valve device (30) is provided with a pressure cap (309), packing (310), and packing seat (308) movable sealing device at the cavity outer barrel (6) through which the valve stem (302) of the external control valve device (30) passes.

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